Pencil-sharpener.



PENCIL SHARPENER. APPLICATION FILED Amm, 1917.

. W/Tll/ESSES naaaeaa, l

. Fig.r3 isa detail in sect antenas .emanan nein-iunafivn iaturescnnisrraiv am., or rnrnannrrnra, run-usar.-

. venia runnin-surname.

To all whom t may concern .Be it iknown that" we,'ll`noMAs ALFRED ARunnin and N IELs CHRISTIAN AHL, citizens of the 'United States, andresidents vof Philadelphia, in the lcountyofPhiladelphia and State oi'Pennsylvania, have invented a new and improved Fencil-Sharpener,'o3t`which the following isla full, clear, and exact description.

@ur invention relates more particularly to that type of pencilSharpeners in which a cutter head is revolublymounted and provided withcutters to accommodate the pencil. A An object of -our invention is toprovide a pencil Sharpener of the indicated type havingan improved drivemeans including a balance wheelon the shaft carrying. the cutter headand adapted to be given momentum by a drive wheel engaging the sameandarranged to be .actuated from the exterior of the Sharpener bytangential pressure thereon by the hand of the operator against theperiphery of thevactuating wheel, or equivalent impetus .given to saidwheel by the operator. l

An important object of the invention also lis to provide a cutter headhaving knives and guide rollers so arranged thereon as to give thepencil a uniform taper. ln thepreiterred form the inventiomalso`contemplates the adjustment of the langular.relation of the cutters andthe guide rollers to vary the taper ofthe sharpened pencil. rlhe.invention furthermore, may embody ladditional guide means particularlyuseful. in sharpenling pencils to a long taper as required by -artistsfor example.

Reference is to be had to the accompany'- ing drawings forming a part otthis speci.

cation in which similar reference characters indicate correspondingpartsin all the Figure 1 is a central vertical sect-ion of a' pencilSharpener embodying our invention; y Fig.- 2 is a fragmentary transversevertical section taken on the line 2 2, Fig. 1

nal plan'v-iewon Kthe line 3 3, Fig. 1; l' .-2

Figs. 4:, 5A and 6 are respectively horizontal sections on the lines 55, and`6-6, Fig.7 isa detailin sectional plan .view on l the line 7 7,Figi, the view being made on a reduced scale;

Specication of Letters Patent. L Fatmmgd ,Mmm 29 1mm, Apjgvleationl ledAugust 9, 1917. Serial No. 125,270. i i

Fig 8 is a detail in' verticalsection on the line 8 8, Fig. 7 i' Fig. 9is a perspective view of one of the knives; p

Fig. 10 is a partly sectional side elevation of a modified cutter headhaving the knives and guide rollers in iixed positions.

Referring more particularly to the form suitable .hollow base 10 `isprovided having a bottom ll and a-cap 12, said parts being preferably inpractice `produced from sheet metal. A glass dome 13 rests on the base10 spring pressed frame 22a' pivoted as at 22bv land acted on by anysuitable spring 22,

whereby the :trame and drive wheel may be swung into or out of drivingconnection with the shaft 19. The said drive wheel 21 projects laterallythrough an opening in a. side of the base 10 between brackets 23 housingthe major portion of the projecting part of the wheel leaving theperiphery of said Wheel exposed. By the operator grasping, orfrictionally engaging the wheel -21 by a tangential. movement of thehand, sucient momentum is given tothe shaft 19 with its power wheel 21to store up the power necessary .to give/ga sustained driving movementto the Sharpener. To prevent reverse moveof the invention shown in Figs.1 to 7 ,ia

ment of wheel 21, a brake dog 21 pivoted at 21b is adapted to engagesaid wheel; 21 is a. resistance stud beneath the wheel.

The upper end of the shaft 19 extends above the top 12 and has securedthereto the cutter head 24:, the body of which generally is in the formof a shell, said cutter head being secured to the shaft'in anysuitablemanner as by means of a threaded tenen 26-on the shaft to bereceived in a -z-'threaded socket in the under side of the v bottom 25of the cutter head. Knives 27 as shown best in Fig.l 6 are provided inthe scribed. In the top of the cutter head 24 are upper and lowerconcavo-.convex disks 29, 30. The lower disk 30 is formed with radialslots 31 and the upper disk 29 has eccentricslots 32 through which slotsthe pins 33 of the knives project, the upper ends of the pinsbeingreceived in a clearance' space or groove 34a in a cap nut 34-which isreceived on a threaded boss 30 on the disk 30, said boss extendingthrough the center of the upper disk 29.

The cutter head 24 is provided also with conical guide rollers 35turning in carriers 36, one bearing`37 o f each roller 35 being in theform preferably of a screw pin passing through the upper end of thecarrier 36 and extending through a boss 38 thereon, said boss beingdisposed in a radial slot 39 of the lower disk 30 and the projecting endof the pin 37 extending -through an eccentric slot 40 in the upper disk29, said pins pr'ojecting into the clearance space or groove 34a of thecap nut 34. The disk 29 isformed with knobs 29a whereby it may beturned, and it will be obvious that the turning of the disk 29 willcause the eccentric slots 32 and 40 to move'the pins 33 of the knives 27and the pins 37 of the roller carriers 36 radially in the respectiveslots 31, 39, whereby to adjust the angular positions of the lmives androllers relatively to the axis of rotation ofthe cutter head.

The sides of the shell 24 are formed with openings .41 for the escape ofthe shavings of the pencil and these may be removed through a sideopening 42 in the dome 13.

The pencil A is passed through the top of the dome 13 which has anopening alining with the axisof the cutter head. Preferably in theopening is a cap 43 which may be secured by a ring 444 threaded on theneck at the interior of the dome. The neck 43'may receive a bushing 45adapted to slide and turn therein. Said bushing is-turned exteriorlywith a slight taper at its upper end 46 and said upper end is slittedlongitudinally ata desired number of points as at 47 whereby a slidingclamp ring. 48 will serve to tightly bind the bushing on the pencil A.The surface of one or both rollers 35 preferably is ribbed orformed withparallel angular grooves, whereby the turning of the rollers tends tofeed the pencil to the cutters. The sleeve 49 is particularly useful informing-a long taper on the pencil without danger of breaking the point.

Inthe form shown in Fig. 10, the knives and guide rollers are fixed. Inthis form the shell 24a corresponding with the shell 24 is suitablysecured to the shaft 19a and the `knives 27a are formed with anges 27"at the upper and lower ends, the flanges being secured by screws 27c orthe like to the top 24b and bottom 24c of the shell. The rollers 352Lare secured in fixed position in the top 24b by screws 49 or equivalentmeans.

We wish to state in conclusionthat although the illustrated exampleconstitutes a practical embodiment of our invention, we ydo not wish tolimit ourselves to the mechanical details herein illustrated, sincemanifestly the same can be considerably varied without departure fromthe spirit of the invention as defined in the appended claims.

Having thus described our invention we claim as new, and desire tosecure by lietters Patent:

1. A cutter head for pencil Sharpeners, including cutters supported insaid head, conical rollers in said head between the cutters, saidcutters and rollers being adapted to accommodate a pencil therebetweenand being inclined to the axis of rotation of the cutter head, and atubular encil holding device revolubly and slida ly supported above thecutter head and coaxial with the latter.

2. A cutter head for encil Sharpeners, including knives, and feed) andguide rollers rockably supported at oneend in the head and radiallyadjustable at their opposite ends in lsaid head.

3. A cutter head for pencil Sharpeners, including cutters supported insaid head, and conical rollers in said head between the cutters, saidcutters and rollers bein adapted to accommodate a pencil there etweenand being inclined to the axis of rotation of the cutter head, one ofsaid rollers having ribs thereon.

4. A cutter head for pencil Sharpeners adapted to receive a pencilaxially therein, a knife positioned in said head to act on the insertedpencil, and a conical roller on said,

head in position to engage the inserted pencil, said roller beingroughened to have a feeding action on the pencil.

5. A cutter head for pencil Sharpeners, including cutters supported insaid head, and

.conical rollers in said head between the cutters, said cutters androllers bein adapted to accommodate a pencil there etween and beinginclined to the axis of rotation of the cutter head; together with meansto vary the angular positions of the said cutters and rollers.

6. In a cutter head for pencil Sharpeners,-

the combination of knives rockably supported at one end in the cutterhead, concavo-convex disks on the cutter head at the opposite end, oneof said disks being turnable and formed with eccentric slots, and theother of said disks having radial slots, guide rollers between` theknives, the knives and rollers being disposed at an angle to 13(:Lenawee v @i the axis of rotation of the cutter head, carone end in thecutter head and formed with. w riers for said rollers, the said knivesand an oHset pin at the opposite end, and means carriers each havin amember projecting to radially move said Pin to adjust the anguthrough aradial an conical slot in the relar position of the knife in the cutterhead,

spective disks, and means to turn the disk said means including arevolulole disk havliaving the eccentric slots to vary the anguing aneccentric slot in which the pin of la lar positions of the knives androllers. the knife is received.

Y. A cutter head for a pencil Sharpener, THOMAS ALFRED RUDDLE. includinga knife lrockably supported at NlUELS CHRliSTllAN

